Improvement in rotary cutter-heads



UNITED STATES 'OFFIGE.

SAMUEL o. HOUGHTON, 0F LITTLE FABIJS, NEW YORK.

IMPROVEMENT INv ROTARY CUTTER-HEADS.

Specification forming part of Letters Patent No. 173,122, dated February8,1876 application filed 1.

J one 28, 1875.

To all whom it may concern:

Be it known that I, SAMUEL G. HOUGHTON, of Little Falls, in the countyof Herkimer and State of New York, have invented a new and usefulImprovementin Rotary Gutter-Heads; and I do hereby declare the followingto be a full, clear, and exact description of the same, reference beinghad to the accompanying drawings, forming part of this specification, inwhich' Figure 1 is a side elevation of a cutter-head. Fig. 2 is atransverse section of a cutter-head, and Fig. 3 is a transverse sectionof a copehead.

Similar letters of reference in the accompanying drawings denote thesame parts.

This invention relates to that class of rotary cutters employed fortonguing, grooving, molding, beading,&c.; and it has for its object,first, to reduce the original cost of constructing-snch outter=heads;-secondly, to render it easier to keep the cutting-points sharp and theiroutlines of the proper form; thirdly, to prevent friction of the headagainst the wood while cutting; fourthly, to diminish vibration; and,generally, to render the whole cutting device more constantly efficientand more durable than heretofore. To these several ends the inx'entionconsists in constructing the cutter-head of two semicircular plates,having their straight edges placed together, so that one corner of eachplate shall project far enough beyond the periphery of the adjacentplate to form a cutting-point, the two plates being locked firmly insuch position by means of embedded rings, and mounted upon a suitableshaft or mandrel, by which they are rotated.

[n the drawings the invention isrepresented I is constructed by cuttingout a circular steel plate, and turning in a lathe or otherwise formingthe peripheral edge thereof, so that its cross-section shall be thereverse of that which t is designed to impart to the wood.@. This plateis then sawed in two, in doing which the on one or both faces to receivethe embedded rings, and bored to fit 'the shaft or mandrel.

The rings are then introduced, the corners undercut to adapt them tooperate as cutters, and the head placed upon the shaft, spindle,

' or mandrel, and secured by collars, or a collar and bolts, in theusual "inanner. The order of proceeding here indicated may, of course,be varied to suit the convenience of manufacturer. r

In the drawings, M is the mandreh'and A A are the two semicircularsegments, locked together by embedded I rings 1' r. the edge is formedwith a central cutter, e, to cut out the groove for the panel, and twoside cutters, s s, to reduce the corners at each side of the groove toan ogee form. In Fig. 3 the edge is formed to cut out the end of thewood, first on one side of tenon, and then on the other, to lit themolding with which the mullion or rail is to be used. The undercut 0enables the cutters to be sharpened at any time by simply grinding thewall of the undercut notch, thereby preserving the contour of thecutting-edge until the cutteris nearly or quite used up. The removal ofthe metal in sawing the circular plate in two enables the segments to bebrought together, so that their outer edges will not rub against thewood after the cut is made. For the purpose. of preventing friction ofthe tongue 6 against, the walls of the groove,-Which it cuts, it may beturned under or made with dovetail cross-section,as shown in thedrawings.

In cope-heads as shown in Fig. 3, a stout. collar or circular plate, P,may be secured to the end of the mandrel, and provided either with aprojecting annular flange or head, or

.an annular bed to receive a ring, 1'. The cutter-segments may then befitted onto the annular flange or thering, and bolted to the collar orplate by means of bolts 43 i. j

' I am aware of the'existence and construction of the heads'usuallycalled frizzing-heads, and of the head described and shown inLet- InFig. 2,

ters Patent of the United States No. 65,954, ments having notches cundercut to form prodztted June 18, 1867, and I do not claim eitherjecting cutting-edges at the opposite corners,

as my invention; but substantially as described. 1 d0 claim as newSAMUEL C. HOUGHTON.

The cutter-head constructed of two semicir- Witnesses: cular segments, AA, locked together by D. B. CHASE,

rings 1' r, embedded in their faces, said seg- B. K. HOUGHTON.

